A few people have said:..... and I think Jeff actually said" Blood and Water" ... going back to the Blood is thicker than Water premise. So ... will the relatives be in separate tribes ... likw Tina in one tribe and her husband in the other? Now that would be interesting. It will also be harder to form alliances after the merge.Blood VS water.
If they have the partners/relatives working together on the same tribe, again it would be interesting because it adds a new dimension to the strategies and alliances. It might also have some of the partner dynamics such as on the Amazing Race ... especial since one person in the pair "knows" ... because they have been there done that.
It actually sounds like it might be fun ... and of the rumored players, some are new (the relatives) and some others I have forgotten. .
ETA This opens all kinds of new possibilities ... even to the point of the final TC.